n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 21 |
4 | 73 |
5 | 261 |
6 | 957 |
7 | 3547 |
8 | 13267 |
9 | 50027 |
10 | 189780 |
11 | 723456 |
12 | 2769333 |
13 | 10637790 |
14 | 40984228 |
15 | 158306891 |
16 | 612856611 |
17 | 2377260192 |
18 | 9237543329 |
19 | 35951472496 |
20 | 140116098727 |
21 | 546778366195 |
22 | 2136168391753 |
23 | 8354417782742 |
24 | 32705042089703 |
[1,2,6,21,73,261,957,3547,13267,50027,189780, 723456,2769333,10637790,40984228,158306891, 612856611,2377260192,9237543329,35951472496, 140116098727,546778366195,2136168391753, 8354417782742,32705042089703] |